| QUANTUM FASHION LIMITED | Private company limited by shares | Live |
| Quantum Fertilisers Limited | Private company limited by shares | Live |
| QUANTUM FIELDS LIMITED | Private company limited by shares | Dissolved |
| Quantum Financial Service Limited | Private company limited by shares | Live |
| QUANTUM FINTECH PAYMENT LIMITED | Private company limited by shares | Live |
| QUANTUM LIGHTING FIXTURE LIMITED | Private company limited by shares | Dissolved |
| Franc XLM Quantum Biotechnology Limited | Private company limited by shares | Live |
| Quantum Frontier Limited | Private company limited by shares | Live |
| Quantum Frozen Food Limited | Private company limited by shares | Live |
| Quantum Fund Administration Services Company Limited | Private company limited by shares | Live |
| QUANTUM FUND (CHINA) LIMITED | Private company limited by shares | Dissolved |
| Quantum Hedge Fund Limited | Private company limited by shares | Live |
| Quantum Technologies Fund Limited | Private company limited by shares | Live |
| Quantum Future Limited | | Live |
| Quantum Gain Limited | Private company limited by shares | Live |
| QUANTUM GAME LIMITED | Private company limited by shares | Live |
| GoFintech Quantum Game Limited | | Live |
| QUANTUM GLOBAL LIMITED | Private company limited by shares | Live |
| Global Quantum Limited | | Live |
| Quantum Global Assets Limited | Private company limited by shares | Live |
| Quantum Global Group Limited | Private company limited by shares | Live |
| Quantum Global Introducers Limited | Private company limited by shares | Live |
| Quantum Global Solutions Limited | Private company limited by shares | Live |
| Quantum Technology Global Limited | Private company limited by shares | Live |
| Quantum Global Trade Limited | Private company limited by shares | Live |
| Quantum Global Trade Limited | Private company limited by shares | Live |
| GoFintech Quantum Cloud Limited | | Live |
| GoFintech Quantum Finance Limited | | Live |
| Graceful Love Quantum Technology Company Limited | Private company limited by shares | Live |
| QUANTUM GRAVITATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| GREAT QUANTUM LIMITED | Private company limited by shares | Live |
| QUANTUM GREENERGY COMPANY LIMITED | Private company limited by shares | Live |
| QUANTUM GROUP LIMITED -THE- | Private company limited by shares | Dissolved |
| QUANTUM GROUP LIMITED | Private company limited by shares | Live |
| BO RUI QUANTUM GROUP COMPANY LIMITED | Private company limited by shares | Live |
| QUANTUM GROUP (ASIA) LIMITED | Private company limited by shares | Live |
| CHINA FINANCE QUANTUM GROUP CO., LIMITED | Private company limited by shares | Live |
| China Quantum Chip Group Co., Limited | Private company limited by shares | Live |
| Quantum Financial Group Limited | | Live |
| Quantum Fintech Group Limited | | Live |
| Quantum Technology Group ( Hong Kong ) Limited | Private company limited by shares | Live |
| CHINA QUANTUM INDUSTRY GROUP CO., LIMITED | Private company limited by shares | Live |
| Quantum Investment Group Limited | Private company limited by shares | Live |
| QUANTUM LIGHTING GROUP LIMITED | Private company limited by shares | Dissolved |
| Social Quantum Group Limited | | Live |
| QUANTUM TALENT GROUP LIMITED | Private company limited by shares | Live |
| Jiaxin Quantum Technology Group Co., Limited | | Live |
| Quantum Software Technology Group Co., Limited | | Live |
| QUANTUM POWER GROUPS COMPANY LIMITED | Private company limited by shares | Live |
| Quantum Growth Limited | Company limited by guarantee | Live |
| QUANTUM GROWTH LAB LIMITED | | Live |
| QUANTUM GROWTH CO., LIMITED | | Live |
| Guodun Tianji Quantum Group Limited | Private company limited by shares | Live |
| QUANTUM HEALING CENTRE LIMITED | Private company limited by shares | Live |
| Quantum Health Limited | Private company limited by shares | Live |
| QUANTUM BEAUTY HEALTH CENTRE LIMITED | Private company limited by shares | Live |
| Quantum Health Centre Limited | Private company limited by shares | Live |
| Quantum Digital Health Limited | | Live |
| Quantum HealthTech Limited | Private company limited by shares | Live |
| Quantum Hedge Limited | Private company limited by shares | Dissolved |
| HIDDEN QUANTUM LIMITED | Private company limited by shares | Live |
| GERMANY QUANTUM HIGH TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| QUANTUM GE HIGHTECH LIMITED | Private company limited by shares | Live |
| Quantum Hi-Tech (HK) Biological Limited | Private company limited by shares | Live |
| QUANTUM DATA SYSTEMS (H.K.) LIMITED | Private company limited by shares | Live |
| QUANTUM ELECTRICAL (HK) CO., LIMITED | Private company limited by shares | Live |
| QUANTUM GOLD H.K. LIMITED | Private company limited by shares | Live |
| GoldPort Quantum (HK) Capital Management Co. Limited | Private company limited by shares | Live |
| Quantum Innovation Holding (HK) Limited | Private company limited by shares | Live |
| Quantum Innovation (HK) Limited | | Live |
| Krown Quantum (HK) Limited | Private company limited by shares | Live |
| QUANTUM LEAP (HK) CO. LIMITED | Private company limited by shares | Live |
| Quantum L.S. PR (HK) Limited | Private company limited by shares | Live |
| QUANTUM CAPITAL MANAGEMENT (HK) LIMITED | Private company limited by shares | Live |
| Quantum Medical Investment Group (HK) Limited | Private company limited by shares | Live |
| QUANTUM HI-TECH (HK) MEDICINE LIMITED | Private company limited by shares | Live |
| QUANTUM OPTOELECTRONIC (HK) LIMITED | Private company limited by shares | Live |
| QUANTUM PRODUCTIONS (HK) LIMITED | Private company limited by shares | Dissolved |
| QUANTUM PACIFIC RESOURCES (HK) LIMITED | Private company limited by shares | Dissolved |
| Quantum Lighting Technologies (HK), Limited | Private company limited by shares | Live |
| New Quantum Technology (HK) Limited | Private company limited by shares | Live |
| QUANTUM INNOVATION (HK) TECHNOLOGY LIMITED | Private company limited by shares | Live |
| UNIVERSAL QUANTUM ENERGY (HK) LIMITED | Private company limited by shares | Live |
| Quantum Holding Company Limited | Private company limited by shares | Live |
| QUANTUM HOLDINGS LIMITED | Private company limited by shares | Live |
| QUANTUM NZ HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| On Quantum Holdings Limited | Private company limited by shares | Live |
| QUANTUM HOLDINGS HK LIMITED | Private company limited by shares | Live |
| CHINA QUANTUM HOLDINGS LIMITED | Private company limited by shares | Live |
| QUANTUM DESIGNS (HOLDINGS) LIMITED | Private company limited by shares | Dissolved |
| QUANTUM HOLDINGS (FAR EAST) LIMITED | Private company limited by shares | Dissolved |
| Quantum engineering holdings Limited | Private company limited by shares | Live |
| Quantum Equilibrium Holdings Limited | Private company limited by shares | Live |
| Quantum Financial Holdings Limited | | Live |
| Quantum Gravity Financial Holdings Limited | Private company limited by shares | Live |
| Quantum Global Payment Holdings Limited | Private company limited by shares | Live |
| QUANTUM GLOBAL SUMMIT HOLDINGS LIMITED | Private company limited by shares | Live |
| Quantum LEEP Group Holdings Company Limited | Private company limited by shares | Live |
| QUANTUM HOLDINGS (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| Quantum Hong Kong Holdings Company Limited | Private company limited by shares | Live |